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3-D Imaging and Analysis of Neurons Infected In Vivo with Toxoplasma gondii
Published on: December 9, 2014
Atomic resolution insight into host cell recognition by Toxoplasma gondii
Tharin M A Blumenschein1, Nikolas Friedrich, Robert A Childs
1Division of Molecular Biosciences, Imperial College London, London, UK.
The EMBO Journal
|May 12, 2007
Summary
Toxoplasma gondii micronemal protein 1 (TgMIC1) has a novel cell-binding motif, the microneme adhesive repeat (MAR). This structure binds sialylated sugars, offering new targets for toxoplasmosis therapies.
Area of Science:
- Parasitology
- Structural Biology
- Molecular Biology
Background:
- Toxoplasma gondii is a widespread parasite causing toxoplasmosis.
- Micronemal proteins (MICs) are crucial for parasite invasion.
- TgMIC1 is a key MIC involved in host cell interactions.
Purpose of the Study:
- Determine the atomic structure of TgMIC1.
- Identify novel cell-binding motifs and interactions.
- Elucidate the mechanism of TgMIC1-glycan recognition.
Main Methods:
- X-ray crystallography for atomic structure determination.
- Glycoarray analysis to identify binding partners.
- Biochemical assays to study protein-glycan interactions.
Main Results:
- A novel cell-binding motif, the microneme adhesive repeat (MAR), was discovered in TgMIC1.
- TgMIC1 specifically binds to sialylated oligosaccharides.
- MAR domains in tandem repeats facilitate high-resolution glycan discrimination.
Conclusions:
- TgMIC1 utilizes MAR domains to recognize sialylated glycans on host cells.
- This interaction is critical for early-stage parasite invasion.
- Findings provide insights for developing new anti-toxoplasmosis therapeutics.
